menu.c

继续上传：单片机89C51

/**********************************多级菜单LCD显示********************************************/
/*********作者：王胜文。QQ：95201972  email：[e-mail] 希望与大家交流2007。08。03**********/


#include<reg51.h>
#include<drive_functions.h>
#include<get_keys.h>
#include<characters.h>
#include<menu_functions.h>
void (*current_operation_index)();
uchar func_index=0;
uchar func_index;
bit enter_flag=0;

typedef struct
   {
	uchar current;   //当前执行的函数索引
	uchar up;		 //按向上键时转向执行函数的索引
	uchar down;		 //按向下键时转向执行函数的索引
	uchar enter;	 //按回车键时转向执行函数的索引
	void (*current_operation)();  //当前执行函数的指针
	} key_table;

 key_table code table[28]=
 {
 	{0,24,8,1,(*fun0)}, //第一层，显示[贵州]，四川，广东，返回
	{1,7,3,2,(*fun1)},//按回车，进第二层，显示[贵阳]，刘盘水，黄平，返回
	{2,2,2,1,(*fun2)},//enter>guiyang is the capital of guizhou,[return]
						
	{3,1,5,4,(*fun4)},//向下，显示贵阳，[六盘水]，黄平，返回
	{4,4,4,3,(*fun5)},//liupanshui is a base of coal mine of southern of china
						
	{5,3,7,6,(*fun7)},//向下，显示贵阳，六盘水，[黄平]，返回
	{6,6,6,5,(*fun8)}, //huangping is my hometown,[return]
						
	{7,5,1,0,(*fun10)},//贵阳，六盘水，黄平，[返回][
						
	{8,0,16,9,(*fun12)},//贵州，[四川]，广东，返回
	{9,15,11,10,(*fun13)},//[成都]，绵阳，乐山，返回
	{10,10,10,9,(*fun14)},//chengdu is the capital of sichuan province,[return]
	                       
	{11,9,13,12,(*fun16)},//成都，[绵阳]，乐山，返回
	{12,12,12,11,(*fun17)},//miangyang is a technology city of western china,[return]
	                       
	{13,11,15,14,(*fun19)},//成都，绵阳，[乐山]，返回
	{14,14,14,13,(*fun20)},//leshan have leshan dafu,[return]
	                       
	{15,13,9,8,(*fun22)},//down>成都，绵阳，乐山，[返回]
	                        
	{16,8,24,17,(*fun24)},//down>贵州，四川，[广东]，返回
	{17,23,19,18,(*fun25)},//enter>[深圳]，广州，惠州，返回
	{18,18,18,17,(*fun26)},//enter>i'm now in shenzhen,[return]
	                        
	{19,17,21,20,(*fun28)},//down>深圳，[广州]，惠州，返回
	{20,20,20,19,(*fun29)}, //enter>guangzhou is the capital of guangdong,return
	                         
	{21,19,23,22,(*fun31)},//down>深圳，广州，[惠州]，返回
	{22,22,22,21,(*fun32)},//i'm in huizhou in 1997,[return]
	                        
	{23,21,17,16,(*fun34)},//深圳，广州，惠州，[返回]
	                         
	{24,16,0,25,(*fun36)},//贵州，四川，广东，[返回]
	{25,26,26,27,(*fun37)},//[关闭]，重启
	{26,25,25,0,(*fun38)}, //关闭，[重启]
	{27,27,27,27,(*fun39)}//关闭
	
	};



void main(void)
{

current_operation_index=fun0;//初始化函数指针，使程序运行时执行第一个函数功能

while(1)
{                 
if(CheckState())                      //检查是否有键按下
		{
			delay();                    //延时去抖动
			
			if(CheckState())
			{
				key=GetKeys();          //读取键盘值
			

/*******************find index****************************/
switch(key)
{
	case 0x14:
				func_index=table[func_index].up;    //向上翻
				break;
	case 0x24:
				func_index=table[func_index].enter;//回车
				enter_flag=1;
				break;
	case 0x44:
				func_index=table[func_index].down;//向下翻
				break;
	default:    
				break;

      				}
   				}        

		current_operation_index=table[func_index].current_operation;
		if(enter_flag==1){ClearLCD();enter_flag==0;}   //如果按了回车则需要清屏
 	}    
	  
	  // fun40();//显示左屏固定信息
	  (*current_operation_index)();//执行当前操作函数
}
      
}